API v2
High-performance transaction submission with reduced overhead.
Last updated
High-performance transaction submission with reduced overhead.
A faster alternative to JSON-RPC that eliminates JSON parsing overhead and CORS preflight latency. Recommended for browser clients and performance-sensitive backends.
Method
POST
Path
/api/sendTransaction2?c=<YOUR_API_KEY>
Content-Type
text/plain
Body
Base64-encoded transaction bytes
The body must be base64. API v2 does not accept raw binary transaction bytes. If you want to submit raw binary, use Batch Send, which works for a single transaction too.
Returns an empty body with 200 OK on success. Does not return a transaction signature. Compute and track the signature client-side before submitting, then verify landing on-chain or in the dashboard.
No CORS preflight
Saves 50–100ms per request from browser clients
Faster encoding
Base64 is faster to encode/decode than base58
Smaller payload
No JSON wrapper, plain text body
Lower overhead
No JSON parsing on the server side
Use API v2 when you don't need the transaction signature returned in the response, and want the lowest possible submission latency. Ideal for browser-based applications and high-frequency backends.
If you need a transaction signature in the response, use JSON-RPC instead.
Last updated